*{
    margin: 0;
    padding: 0;
    list-style: none;
}
body{
    width: 1903px;
    overflow-x: hidden;
}
h1{
    text-align: center;
}
.title{
    margin: 20px 0;
}
.title ul{
    position: relative;
    height: 30px;
    width: 300px;
    margin: auto;
}
.title li{
    position: absolute;
    width: 100px;
    height: 30px;
    font-size: 20px;
    border-radius: 3px;
}
.title li:nth-of-type(1){
    color: orange;
    left: 0;
}
.title li:nth-of-type(2){
    right: 0;
}
.title span{
    cursor: pointer;
    display: inline-block;
    width: 100px;
    height: 30px;
    text-align: center;
}